Reject non-text data when in strict mode.
Remove DEBUG statements: the API and the code are now stable and tested.
Remove obsolete keep-meta-info feature.

This fixes a performance issue introduced in previous accepted patch.

Thanks to Christian Nybø. https://github.com/fare/fare-csv/pull/2

Added according regression tests.

Make sure the last field of a line is read

This commit fixes the following bug:

If the last field of a line was empty, it would not be added to the list
returned by READ-CSV-LINE. The problem was that the check for eol was
performed both at the start of the field and at the end.

should not be considered as a space that can be skipped.